Simultaneous measurement of beta-delayed proton and gamma emission of ${}^{26}$P for ${}^{25}$Al($p,{\hat{I}}^3$)${}^{26}$Si reaction rate

Abstract

${\hat{I}}^2$ decay of ${}^{26}$P was used to populate the astrophysically important $E_x=$5929.4(8) keV $J^{\ddot{I}}€=3{}^{+}$ state of ${}^{26}$Si. Both ${\hat{I}}^2$-delayed proton at 418(8) keV and gamma ray at 1742(2) keV emitted from this state were measured simultaneously for the first time with corresponding absolute intensities of 11.1(12)\% and 0.59(44)\%, respectively. Besides, shell model calculations with weakly bound effects were performed to investigate the decay properties of other resonant states and a spin-parity of $4^{+}$ rather than $0^{+}$ was favored for the $E_x=$5945.9(40) keV state. Combining the experimental results and theoretical calculations, ${}^{25}$Al($p,{\hat{I}}^3$)${}^{26}$Si reaction rate in explosive hydrogen burning environments was calculated and compared with previous studies.